Covering for worsted type spinning rolls



WWII/hag) v Feb. 20, 1945. v A N g 2,369,635

COVERING FOR WORSTED TYPE SPINNING ROLLS Filed April 19, 1941- Rttormqs Patented Feb. 20, 1945 um'rso STATE sq PATENT o F cr:v

COVERING FOR wons'rsn TYPE SPINNING ROLLS v Henry M. Bacon, Dayton, Ohio, assignor to The Dayton Rubber Manufacturing Company,

method of mounting tires or wearresistant cov-v erings on a wheel or roller core to provide a wheel or roller member having a friction resistant cov-. ering fixed on the periphery thereof. My invention is more particularly described in connection ing surface, the whole forming-a unitary roll covering. I

Another object is to devise an improved method of mounting the tire-like covering on a wheel with the making of an improvedfiber working covering for spinning rolls as used in textile working machinery. However, it'is not limited to this type of machines and is applicable for-permawherein the covering is made somewhat smaller than the core or roll on which it is to be fitted. the covering having a tension absorbing layer adiacent a compression layer which is in contact .with the peripheral surface of the core and nently mounting tires or coverings on various kinds of wheels such as used on vehicles, trucks, tractorsand the like. Y Y

My invention provides a simplemethod of fixedly positioning tires ,or coverings on wheels.

One of the principal objects of this invention is to provide a covering layer of abrasive resistant resilient material on the surface of a wheel'or roll by mechanically bindingthe innermost portion of the covering against the peripheral surface of the wheel.

Another object is to provide an improved tire for a wheel and method of mounting wherein the outer covering is permanently fixed to the rim of the wheel without requiring vulcanization of v the covering on the rim of the wheel; Q a

Another object is to provide an improved spin- 'ning roll having the outer fiber working covering mounted thereon which has all the gripping j properties of a vulcanizedbonded cover, wherein the fiber working surface layer is free from working strains or stresses resultant from bonding the covering onto the surface of the roll.

Another object is to devise an 'improvedreim.

forced covering for a spinning roll which can be readily mounted on a wheel-like core with or whereby the tension absorbing layer of the covering takes up the compressive stresses set up in the covering when the same is stretched over and mounted on the'larger diameter roll core, leaving the outermost portion of the covering free .from internal stresses.

These and other objects and advantages will appear from the following description taken in connection with the drawing, wherein for the purpose of illustrating this invention I have shown the same as applied to a worsted spinning. roll. Figure 1 is'a view in elevation of a worsted type spinning roll made according tomy invention;

Figure 2 is an exploded view of a spinning roll core and fiber working cover for mounting thereon, the covering being shown partly in section to illustrate the laminated construction:

Figure 3 is a similar view as Figure 2 showing the covering or cot mounted on the roll and without adhesive to provide the spinning rollwith a fiber working covering which comprises a. temforced section for taking up the binding stresses leaving the outerflber working surface portion of the covering substantially free from any tension or compression stresses. 1

Another object is to provide a tire-like covering wherein the tire comprises an inner compression layer, a strength layer disposed-over said com pression layer. and an outer. wear resistant sin face layer made up of synthetic' rubber composition having the proper'coeflicient of, friction.

Another object is to devise an improved method of making a spinning roll covering which comprises a wheel-like core having mounted thereon a fiber working covering which coveringcomprises an inner compression layer, a reinforced tension section, and an outer smooth fiber workwherein the fiber working covering is shown in section;

Figure 4 is a fragmentary sectional view taken on the line 4-4 of Figure 7; I I

Figures 5, 6, 7. and 8 are fragmentary sectional views taken through a portion of the roll andcoveringillustrating different modified constructions.

of the covering;

In general, it has been in mounting resilient coverings, such as tires and the like, onwheels to provide a vulcanizable adhesive layerbetween the rim ofthe wheel and thecovering to bond the tire to the wheel core and provide a unitary structure. This requiresthat. the wheeland tire be processed together in order to provide a proper bonding ,of the tire to the wheel. -Further, no provision is made for eliminating the tension and compressive stressesset up in the tire or covering due to the bonding of the same to the periphery of the wheel. These forceswhich, of course, are exerted continuously:

on the covering accelerate the disintegration and ultimate failure of the tire or covering necessitatingits removal or replacement.

My invention eliminates the above-disadvan- 5 tages and provides an improved tire and method the practice heretofore of mounting the same on a core or roll without vulcanization Referring to the drawing in detail, wherein a typical embodiment of my invention is illustrated in connection with the making of a worsted spinning roll, in Figure l a spinning roll member III is shown in elevation which is provided with my improved fiber working surface covering. The spinning roll comprises a metal wheel-like core ll over which is stretched and frictionally mounted the covering, generally designated [2. This cover means I2 is made in the form of a tire and has a smaller inner diameter than the core II, as illustrated in Figure 2 at 13. The covering material I2 is preferably friction fitted over the periphery of the core II but, if desired, a suitable adhesive coating may be applied to the peripheral surface of the 'core ll prior to fitting the covering thereon.

The covering 12 consists of built-up laminated layers comprising aninner compression layer ll which is in direct contact with the surface of the core II. This compression layer preferably is formed of resilient material, such as rubber or rubber composition, which tenaciously grips the peripheral surface of the core. Over this compression layer It is placed a tens on or strength section l which is designed to take up the compressive stress exerted on the'compression layer I4 brought about 'by stretching the covering over the larger diameter core II. The strength section [5 preferably is made of strong material having high tensile strength and low stretchability, such as-cord or woven fabric. Further, if desired, the strength layer may comprise metal in the form of wire or a band so as to provide a stiffener to take up the compressive stress exerted through the compression layer i4. Any other suitable material may be used for providing the strength section of the covering.

There is then applied over the strength section l5 an outer fiber working section 15 which is of suitable thickness to provide a resilient wear resistant fiber drafting surface. The material of which the fiber working layer I6 is made preferably comprises synthetic resin or rubber composition which is flexible, oil resistant and has a high coefficient of friction. The particular composition of the fiber working layer is not a part of this invention and it will be understood that any suitable resilient, durable material may be used for this purpose.

The fiber working surface I! of the covering II preferably is ground or buffed to provide a smooth even surface having the proper coefficient of friction. In making the resilient covering of synthetic rubber composition it is conventional to form the same on a mandrel and compress layers together by a wrapper applied around the outer surface 'of the covering under tension.

After vulcanizing or curing the built-up covering the wrapper is removed leaving the imprint of the cloth or material used which is subsequently ground off to provide a smooth even surface.'

In Figures 5, 6, 7 and 8 there is illustrated the use of metal, fabric, textile cord and Stifiex respectively as the strength or tension layer 15. It is also possible, if desired, to combine the compressive and strength layers into one section, such as with the use of Stifiex alone. This material, as conventionally made, comprises resilient material having fine textile fibers disposed therein wherein the fibers are generally arranged parallel to each other and form a dense, tough,

resilient composition having a high resistance to stretching.

Further, if desired, a hard vulcanized rubber or multiple plies of cord or fabric may be utilized as the strength layer l5.

By this method of construction an improved spinning roll covering is provided wherein the covering comprises a strength section which will take up the compressive stresses and strains resultant from stretching the covering over the larger diameter core and maintaining it in this condition during use. In making a spinning roll according to my invention, the outer fiber work ing layer of the covering or cot is kept substantially free from bonding stresses. These stresses are absorbed by the strength layer l5 which comprises material of low stretchability arranged adjacent the compression section I in contact with the peripheralsurface of the roll core. The roll covering is ordinarily built up on a mandrel which is slightly less in diameter than the spinning roll core or wheel on which the finished cover is to be mounted. The different layers forming the laminated cot are laid thereon and vulcanized to form a unitary covering member. after which the covering is removed from the mandrel and mounted on a roll core or wheel, as illustrated in Figures 2 and 3 and described. I have accordingly devised a wheel surface covering'which can be permanently fitted to the outer peripheral surface of a wheel or roll without vulcanizing or otherwise treating the covering or wheel surface.

It will be further understood that my invention is not, to be limited to the details of construction as illustrated and described and that the invention may be modified to suit different conditions and use'swithout departing from the spirit and scope of my invention as defined in the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. As an article of manufacture, a cot for worsted or other type spinning rolls, said cot compriisng an innermost compression layer of resilient rubber-like material for frictionally gripping .the peripheral surface of said roll, and a strength layer of parallel cards of substantially non-extensible material disposed adjacent said compression layer for exerting bonding force on said compression layer to frictionally bind said innermost layer to the periphery of said roll, said cot having an outer smooth fiber working surface of rubber-like material harder than that of said compression layer.

2. As an article of manufacture, a unitary spinning roll covering which is adapted for drafting worsted, glass, or other type fibers, said covering comprising a wear resistant fiber working surface of resilient rubber-like material which is substantially static free, an inner reinforced tension layer formed of parallel cords of substantially inextensible material, said tension layer being adapted to apply the bonding stress necessary for fixedly securing the coverin'gonto the spinning roll, and an innermost layer of rubber-like material softer than that of said fiber working surface under said tension layer adapted frictionally to grip the substantially smooth surface of said roll.

3. A spinning roll comprising a discoidal core having a substantially smooth nonscored surface, and an annular facing comprising an outer ring of rubber-like material constituting a re- I ascaess ailiently yielding tread, an inner ring comprising parallel cords of substantiallyinextensible stress-absorbing material permanently attached to said-outer ring, and an annular layer of rubher-like material, softer than that of said outer ring and permanently attached to the inner surface of said inner ring adapted frictionally to grip the periphery of said core.

4. An annular facing :01- a substantially smooth nonscored core surface comprising an outer ring -of rubber-like material constituting a resiliently yielding tread, an inner ring comprising parallel cords of substantially inextensible stress-absorbing material permanently attached to said .outer ring, and an annular layer of rubber-like matediameter roll core to frictionally bond the outer working layer to the peripheral surface of the core.

"7. As an article of manufacture, a worsted spinning roll working surface covering adapted for fixedly mounting on a spinning roll core member having a substantially smooth surface, said covering comprising'an endless tireformcd of oil resistant synthetic rubber composition which is substantially white in color, said tire 7 having a layer'of parallel cords oi substantially rial softer than that of said outer ring and I permanently attached to the inner surface of said inner ring adapted frictionally to. grip the periphery of said core.

5. As an article of manufacture, a smooth sursion gripping layer of relatively softer composition compared with the outer layer, and an adiacent tension layer formed of parallel cords for I mechanically binding the inner compression -grlpping layer to the periphery of said roll, said covering being mounted on the smooth surface of said roll whereby the bonding stresses are taken up by the tension layer and the outer portion of the covering is free from working strains and stresses. 7

6. A fiber drafting machine unit comprising a nonscored spinning roll core having a fiber working covering of synthetic resin or rubber composition fixedly mounted thereon, said covering having an outer working surface layer, an inner face roll having a covering fixedly secured thereto, said covering comprising an outer wear resistant resilient composition layer, an inner compres non-extensible material for taking up the binding stresses produced when said tire is stretched over and mounted on the roll core member, an outer. fiber working layer positioned over said cord layer, and winner gripping layer of rubber softer than that of the other said layers and adapted frictionally to grip the smooth surface of said core.

nonscored spinning roll core having a fiber working covering member of synthetic resin or rubber composition fixedly mounted thereon, said covering comprising an inner compression layer of relatively softer composition for gripping the nonscored outer surface of the roll core, a non- 8. A fiber drafting machine unit comprising a extensible strain layer of parallel cords adjacent thereto for absorbing the binding stresses set up in the compression layer, and an outer fiber working surfac portion of relatively harder composition than the compression layer of said covering having a smooth even surface for drafting fibers which is substantially free from internal stresses.

compression layer of resiilent material softer,

than that of the outer working surface layer for gripping the nonscored surface of said core, and a reinforced substantially unextensible tensionlayer of parallel cords arranged thereover for absorbing the compressive stresses incident to frictionally bonding the innercompression layer to the nonscored periphery of said core, said integral diameter somewhat less than said core on which it is fitted whereby the compression layer will be compressed to a maximum degree without permanently distorting the outer working is .and wherein said reinforced tension layer abaorbathe compressive stresses resultant covering comprising a unitary body having an 9. As an article of manufacture, a spinning roll covering adapted to be'mounted on a wheellike core member having a substantially smooth I rubber composition harderthan that of said inner compression layer integral with saidcompression and ins stresses.

strength layers, which fiber working surface layer is substantially free from bondrrmmv is. BACON. 

